One of the fingers on his right hand was also severed and the court heard there was evidence he had been tied up with cable ties.

Mr Fiannaca submitted it was "difficult" to draw a conclusion about which exact injury caused Mr Davies' death, saying it may have been a result of a combination of all of them.

He also said many of the injuries were consistent with being inflicted while Mr Davies was alive.

Photographs of the inside of Mr Davies' home showed an area of blood staining on the floor and blood stains on the wall which Mr Fiannaca said "suggested he was on the couch with his head against the wall, hitting the wall, and blood streaming down".

"He did have ... very severe lacerations to his head ... a stab wound in his neck which cut the jugular vein," he said.

Mr Fianacca said two knives were found in the wheelie bin containing Mr Davies' body parts.

He Fiannaca said Mr Davies "had steeped himself in the insidious business of drug dealing" and had done business with all of the four accused men, two of whom he said were also drug dealers.

He said those two, Roberts and Gandy, believed Mr Davies had "swindled" them and had decided he was going to pay them what he owed.

He told the jury: "They decided he would pay with his life".

"The most powerful proof of their intention to kill, was the gruesome contents of the wheelie bin found in Mr Roberts' house."